Table 3.
Selected Determinants of Bone Health, by Sex Designated at Birth
| Designated Females at Birth | Designated Males at Birth | P Value | |
|---|---|---|---|
| Age at blocker placement, years, mean ± SD (95% CI) |
11.0 ± 1.4 (10.5-11.5) |
12.1 ± 1.3 (11.7-12.6) |
0.002 |
| Tanner stage, mean ± SD (95% CI) | 2.43 ± 0.50 (2.25-2.62) |
2.30 ± 0.47 (2.14-2.47) |
0.3 |
| PAQ-C score, (1 = low, 5 = high), mean ± SD (95% CI) | 2.83 ± 0.57 (2.63-3.04) |
2.50 ± 0.69 (2.26-2.74) |
0.04 |
| Serum 25-hydroxyvitamin D, ng/mL, mean ± SD (95% CI) | 30.8 ± 7.3 (28.0-33.7) |
26.9 ± 11.0 (22.6-31.1) |
0.1 |
| Daily calcium intake, mg/day, mean ± SD (95% CI) |
540 ± 269 (441-640) |
676 ± 393 (540-813) |
0.1 |
| BMI Z-score, mean ± SD (95% CI) | 0.28 ± 1.05 (-0.11 to 0.67) |
0.38 ± 1.22 (-0.06 to 0.81) |
0.7 |
| Height Z-score, mean ± SD (95% CI) | -0.03 ± 1.17 (-0.46 to 0.39) |
0.25 ± 1.05 (-0.12 to 0.61) |
0.3 |
Abbreviations: BMD, bone mineral density; BMI, body mass index; CI, confidence interval; PAQ-C, Physical Activity Questionnaire for Older Children.